<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>导航练习02</title>
		<link rel="stylesheet" href="./Bootstrap4.6.1/css/bootstrap.css">
		<script src="./Bootstrap4.6.1/js/jquery.js"></script>
		<script src="./Bootstrap4.6.1/js/bootstrap.bundle.js"></script>
	</head>
	<body>
		<!-- 顶部导航 -->
		<nav class="navbar navbar-expand-sm navbar-dark bg-dark">
		 
		  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#nav01" >
		    <span class="navbar-toggler-icon"></span>
		  </button>
		
		  <div class="collapse navbar-collapse" id="nav01">
		    <ul class="navbar-nav mr-auto">
		      <li class="nav-item active">
		        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
		      </li>
		      <li class="nav-item">
		        <a class="nav-link" href="#">Link</a>
		      </li>
		     <li class="nav-item">
		       <a class="nav-link" href="#">Link</a>
		     </li>
		      <li class="nav-item">
		        <a class="nav-link disabled">Disabled</a>
		      </li>
		    </ul>
		    
		  </div>
		</nav>
		<nav class="navbar navbar-expand-sm navbar-dark bg-dark">
		 
		  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#nav02" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
		    <span class="navbar-toggler-icon"></span>
		  </button>
		
		  <div class="collapse navbar-collapse" id="nav02">
		    <ul class="navbar-nav mr-auto">
		      <li class="nav-item active">
		        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
		      </li>
		      <li class="nav-item">
		        <a class="nav-link" href="#">Link</a>
		      </li>
		     <li class="nav-item">
		       <a class="nav-link" href="#">Link</a>
		     </li>
		      <li class="nav-item">
		        <a class="nav-link disabled">Disabled</a>
		      </li>
		    </ul>
		    
		  </div>
		</nav>
	</body>
</html>